Cumulative Update 13 for Microsoft Exchange Server 2016 was released on June 18, 2019. This cumulative update includes fixes for nonsecurity issues and all previously released fixes for security and nonsecurity issues. These fixes will also be included in later cumulative updates for Exchange Server 2016.
This update also includes new daylight saving time (DST) updates for Exchange Server 2016. For more information about DST, see Daylight Saving Time Help and Support Center.
Known issues in this cumulative update
In multidomain Active Directory forests in which Exchange is installed or has been prepared previously by using the /PrepareDomain option in SETUP, this action must be completed after the /PrepareAD command for this cumulative update has been completed and the changes are replicated to all domains. Setup will try to execute the /PrepareAD command during the first server installation. Installation will finish only if the user who initiated SETUP has the appropriate permissions.
The Set-SendConnector cmdlet does not work for Exchange Server 2016 in hybrid scenarios that have a Edge server installed. For more information, see KB 4523519.
Issues that this cumulative update fixes
This cumulative update fixes the issues that are described in the following Microsoft Knowledge Base articles:
4502154 Providing information to administrators when auto forward limit is reached in Exchange Server 2016
4502155 "The primary SMTP address must be specified when referencing a mailbox" error when using impersonation in Exchange Server 2016
4502156 Audit logs aren’t updated when "-WhatIf" is used as $false in the command in Exchange Server 2016
4502157 The Find command not returning the HasAttachments element in Exchange Server 2016
4502158 SyncFolderItems contains duplicated ReadFlagChange items in Exchange Server 2016
4502131 "TLS negotiation failed with error UnknownCredentials" error after updating TLSCertificateName on Office 365 send connector in Exchange Server 2016 hybrid environment
4502132 Can’t reply to old emails after migration even though old legacyExchangeDN is set to migrated mailbox in Exchange Server 2016
4502136 The response of FETCH (BODYSTRUCTURE) command of IMAP violates RFC 3501 in Exchange Server 2016
4502140 Can’t preview an eDiscovery search when there are multiple domains in Exchange Server 2016
4502141 Appointment that’s created by responding to an email message doesn’t show in any of Outlook calendar views in Exchange Server 2016
4502133 Can't use Outlook on the web to reply a partner email through mutual TLS in Exchange Server 2016
4488396 Can't search any results in manually added shared mailbox in Outlook in Exchange Server 2016
4488078 Public folder contact lists don't show contact's profile picture in Outlook on the web in Exchange Server 2016
4499503 Heavy organizational forms traffic due to materialized restriction when organization forms library has more than 500 items in Exchange Server 2016
4503027 Description of the security update for Microsoft Exchange Server 2019 and 2016: June 11, 2019
Get Cumulative Update 13 for Exchange Server 2016
Download Cumulative Update 13 for Exchange Server 2016 (KB4488406) now.
Download Exchange Server 2016 CU13 UM Language Packs now.
The Cumulative Update 13 package can be used to run a new installation of Exchange Server 2016 or to upgrade an existing Exchange Server 2016 installation to Cumulative Update 13.
You don't have to install any previously released Exchange Server 2016 cumulative updates or service packs before you install Cumulative Update 13.
Cumulative update information
This cumulative update requires Microsoft .NET Framework 4.7.2.
A component that's used within Exchange Server requires a new Visual C++ component to be installed together with Exchange Server. This prerequisite can be downloaded at Visual C++ Redistributable Packages for Visual Studio 2013. For more information, see KB 4295081.
For more information about the prerequisites for the setup of Exchange Server 2016, see Exchange 2016 prerequisites.
You may have to restart the computer after you apply this cumulative update package.
You don't have to make any changes to the registry after you apply this cumulative update package.
After you install this cumulative update package, you can't uninstall the package to revert to an earlier version of Exchange Server 2016. If you uninstall this cumulative update package, Exchange Server 2016 is removed from the server.
For more information about the deployment of Exchange Server 2016, see Release notes for Exchange 2016.
For more information about the coexistence of Exchange Server 2016 and earlier versions of Exchange Server in the same environment, see Exchange 2016 system requirements.
For more information about other Exchange updates, see Exchange Server Updates: Build numbers and release dates.
Learn about the terminology that Microsoft uses to describe software updates.